The Last Revolution in Theoretical Physics Observer-Relative Physics and the Structure of the Current Revolution in Quantum Gravity
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2026
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| _version_ | 1866901309929553920 |
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| author | Witte, Michael |
| author_facet | Witte, Michael |
| contents | <p>Each major revolution in theoretical physics has operationalized a previously assumed absolute. Special relativity eliminated absolute simultaneity through the constant c. Quantum mechanics eliminated definite trajectories and deterministic outcomes through the constant ℏ. Quantum field theory’s conceptual revolution was the<br>recognition that field theory is effective: there is no absolute UV completion, only<br>descriptions valid at a given energy scale. The present paper argues that quantum<br>gravity, through results recently established by Harlow, Usatyuk, Zhao, and Susskind,<br>is completing this sequence. The precision of physical predictions is bounded by e<br>−SOb,<br>where SOb is the entropy of the observer. This bound is dimensionless — not as a standalone structural feature but as the signature that all three fundamental constants c, ℏ,<br>G have been consumed simultaneously through the Bekenstein bound. Bohr’s observer,<br>long assumed as an external classical apparatus of infinite precision, is now derived as<br>the SOb → ∞ limit of a more general framework in which the observer is a finite physical system inside the universe. The observer is not optional, not an approximation,<br>not a classical idealization. It is a derived necessity. This is the precise technical content of what Bohr assumed and never derived. The program is underway, established<br>rigorously in tractable cases, and strongly indicated in general. The technical results<br>are Harlow’s, Zhao’s, and Susskind’s. The historical framing is mine.</p> |
| format | Recurso digital |
| id | zenodo_https___doi_org_10_5281_zenodo_19644874 |
| institution | Zenodo |
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| publishDate | 2026 |
| publisher | Zenodo |
| record_format | zenodo |
| spellingShingle | The Last Revolution in Theoretical Physics Observer-Relative Physics and the Structure of the Current Revolution in Quantum Gravity Witte, Michael <p>Each major revolution in theoretical physics has operationalized a previously assumed absolute. Special relativity eliminated absolute simultaneity through the constant c. Quantum mechanics eliminated definite trajectories and deterministic outcomes through the constant ℏ. Quantum field theory’s conceptual revolution was the<br>recognition that field theory is effective: there is no absolute UV completion, only<br>descriptions valid at a given energy scale. The present paper argues that quantum<br>gravity, through results recently established by Harlow, Usatyuk, Zhao, and Susskind,<br>is completing this sequence. The precision of physical predictions is bounded by e<br>−SOb,<br>where SOb is the entropy of the observer. This bound is dimensionless — not as a standalone structural feature but as the signature that all three fundamental constants c, ℏ,<br>G have been consumed simultaneously through the Bekenstein bound. Bohr’s observer,<br>long assumed as an external classical apparatus of infinite precision, is now derived as<br>the SOb → ∞ limit of a more general framework in which the observer is a finite physical system inside the universe. The observer is not optional, not an approximation,<br>not a classical idealization. It is a derived necessity. This is the precise technical content of what Bohr assumed and never derived. The program is underway, established<br>rigorously in tractable cases, and strongly indicated in general. The technical results<br>are Harlow’s, Zhao’s, and Susskind’s. The historical framing is mine.</p> |
| title | The Last Revolution in Theoretical Physics Observer-Relative Physics and the Structure of the Current Revolution in Quantum Gravity |
| url | https://doi.org/10.5281/zenodo.19644874 |